Distance & resources fixed

resources no longer go below 0 and distance now works
Merge remote-tracking branch 'origin/master'

Conflicts:
	SpaceCraft/SpaceCraft 1.0/bin/Ships/Destroyer.class
	SpaceCraft/SpaceCraft 1.0/bin/Ships/Scout.class
	SpaceCraft/SpaceCraft 1.0/bin/Ships/Sniper.class
	SpaceCraft/SpaceCraft 1.0/bin/Ships/Tank.class
	SpaceCraft/SpaceCraft 1.0/src/Ships/Destroyer.java
	SpaceCraft/SpaceCraft 1.0/src/Ships/Scout.java
	SpaceCraft/SpaceCraft 1.0/src/Ships/Sniper.java
	SpaceCraft/SpaceCraft 1.0/src/Ships/Tank.java